A5079465436- Advanced Electrical Measurement Techniques
- Scientific Measurement and Uncertainty Evaluation
- Radioactive Decay and Measurement Techniques
- Sensor Technology and Measurement Systems
- Surface and Thin Film Phenomena
- Magnetic Field Sensors Techniques
- Quantum and electron transport phenomena
- Atomic and Subatomic Physics Research
- Hepatitis C virus research
- Attention Deficit Hyperactivity Disorder
- Advanced Frequency and Time Standards
- Neurotransmitter Receptor Influence on Behavior
- Alcohol Consumption and Health Effects
- Sleep and related disorders
- Mental Health Research Topics
- Healthcare Systems and Practices
- Mental Health Treatment and Access
- Homelessness and Social Issues
- Schizophrenia research and treatment
- Substance Abuse Treatment and Outcomes
- Blood Pressure and Hypertension Studies
- Power Quality and Harmonics
- Neuroscience and Neuropharmacology Research
- Power Transformer Diagnostics and Insulation
- Advanced Sensor Technologies Research
Bureau international des poids et mesures
2012-2025
Centre Hospitalier Le Vinatier
2019-2024
Hospices Civils de Lyon
2020-2024
Université Claude Bernard Lyon 1
2019-2024
Istituto Nazionale di Ricerca Metrologica
2023
Inserm
2021-2023
Centre National de la Recherche Scientifique
2021-2023
Centre de Recherche en Neurosciences de Lyon
2021-2023
Institut de Recherche pour le Développement
2022
Fondation FondaMental
2020
For more than three decades, GaAs/AlGaAs quantum Hall (QH) devices are being used as standards for the realization of dc resistance unit ohm. Recently, outstanding performance graphene-based (QHR) signifies an immense potential a transition from GaAs to in field and also impedance metrology, with equally good accuracy. The recent developments epitaxial graphene (EG) quality fabrication EG-based doped QHR their improved tested several national metrology institutes (NMIs) all over world have...
An on-site comparison of the quantum Hall effect (QHE) resistance standards Physikalisch-Technische Bundesanstalt (PTB) and Bureau International des Poids et Mesures (BIPM) was made in November 2013. Measurements a 100 Ω standard terms conventional value von Klitzing constant, RK-90, agreed to 5 parts 1010 with relative combined uncertainty uc = 22 × 10−10. 10000 Ω/100 Ω/1 ratios 7 19 10−10 8 40 10−10, respectively. investigation Peltier present 1 carried out during this is also reported, as...
In 2017 the Consultative Committee for Electricity and Magnetism (CCEM) commissioned a key comparison of electrical capacitance standards, second time this quantity has been compared since implementation Mutual Recognition Agreement by Comité International des Poids et Mesures (CIPM—MRA) in 1999. This comparison—CCEM-K4.2017—was piloted Bureau (BIPM) included seven National Metrology Institutes (NMI) belonging to four Regional Organizations. The measuring scheme adopted was that star...
An on-site comparison of the quantum Hall effect (QHE) resistance standards Czech Metrology Institute (CMI) and Bureau International des Poids et Mesures (BIPM) was made in April 2017. Measurements a 100 Ω standard terms conventional value von Klitzing constant, R K-90 , agreed to 6 parts 10 with relative combined uncertainty u c = 25 × −10 . 10000 Ω/100 Ω/1 ratios 11 22 33 32 respectively. The influence current reversal time has been systematically investigated order take into account...
This paper details developments in the use of room temperature current comparators operating with low-frequency (<;1 Hz) ac for precision resistance metrology. We consider possible benefits this technique over traditional reversed-dc operation. describe construction high-sensitivity suitable such low frequency. 100 Ω to quantum Hall (QHR) ratio measurements are demonstrated at frequencies below 0.2 Hz and relative accuracies 1 part 108 or better. Resistance bridges based on technology offer...
Two prototypes of a current comparator for operation at low frequencies in the 0.1 Hz to 1 range and room temperature have been realized. Experimental tests include determination frequency-dependent sensitivity comparative measurement ratio two standard resistors with nominal values kΩ 100 Ω. The realized is main precision ac resistance bridge operated without need liquid helium which will be one instruments future graphene-based quantum Hall standard.
Improved magnetic materials open the perspective of operating room-temperature current comparators at lower frequency without compromising metrological accuracy. Two prototypes low-frequency comparator (LFCCs) have been successfully tested in precision resistance ratio measurements drive frequencies 0.5 Hz and 1 using BIPM's bridge setup with a recently realized extension. These performed standard resistors 10 kΩ, kΩ 100 Ω nominal values as well quantized Hall (QHR) GaAs graphene devices.
Schizophrenia is characterized by the misattribution of emotional significance to neutral faces, accompanied overactivations limbic system. To understand disorder's genetic and environmental contributors, investigating healthy first-degree relatives crucial. However, inconsistent findings exist regarding their ability recognize with limited research exploring cerebral correlates face processing in this population. Thus, we here investigated brain responses through an image-based...
Introduction The mental health of residents is a growing significant concern, particularly with respect to hospital and university training conditions. Our goal was assess the professional, academic, psychological determinants status all academy Lyon, France. Materials methods Health Barometer Lyon Subdivision Residents (BASIL) an initiative which consists in proposing recurrent online survey medicine, pharmacy, dentistry, belonging subdivision. first these surveys conducted from May July...
This paper describes a bias source that has been developed to configure the Programmable Josephson Voltage Standard used in BIPM Kibble Balance. It thirteen channels based on current sources with floating output. The operation of verified PJVS system, exhibiting accuracy reference voltage at \pmb10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-8</sup> level.
Adjustment of the charge carrier density in quantized Hall resistance (QHR) devices based on epitaxial SiC graphene films can be performed using photochemical and chemical gating. Our experiments show that concentration fabricated reversibly varied by either treatment with UV light or molecules from aqua ammonia. Treatment QHR such a way provides tuning to optimum values, range (1-3) × 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sup>...
Main text This report gives the result of a bilateral comparison resistance between CEM (Spain) and BIPM carried out from March 2022 to September 2022. Two 1 Ω two 10 kΩ travelling standards belonging were used. The was with an 'A-B-A' pattern measurements; measured first at for period about one month, then month CEM, finally again BIPM. measurand 4 terminal dc low power. pilot laboratory, forms part ongoing key comparisons BIPM.EM-K13.a (for Ω) BIPM.EM-K13b kΩ). results found be in good...
Main text This report gives the result of a bilateral comparison resistance between INRIM (Italy) and BIPM carried out from October 2022 to February 2023. Two 1 Ω two 10 kΩ travelling standards belonging were used. The was with an 'A-B-A' pattern measurements; measured first at for period about one month, then month half INRIM, finally again BIPM. measurand 4 terminal dc low power. pilot laboratory, forms part ongoing key comparisons BIPM.EM-K13.a (for Ω) BIPM.EM-K13b kΩ). results found be...
This paper describes the development of a thermally regulated enclosure for standard resistor elements. The design, using Peltier element, can work in wide range possible laboratory temperatures, with mK stability. Combined high quality resistance robust working 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-9</sup> level relative stability is produced.
This report gives the result of a bilateral comparison resistance between NIM (The People's Republic China) and BIPM carried out at end 2018, beginning 2019. Two 1 Ω two 10 kΩ travelling standards belonging to were used. The was with an 'A-B-A' pattern measurements; measured first for period about one month, then month NIM, finally again BIPM. measurand 4 terminal dc low power. pilot laboratory, forms part ongoing key comparisons BIPM.EM-K13.a (for Ω) BIPM.EM-K13.b kΩ). results from found be...
This paper considers the problem of defining measurement conditions that approximate `DC' for resistance standards. A recent on-site comparison between BIPM and PTB highlighted this difficulty in dealing with Peltier heating 1 Ω standards, but it is a general variety causes. We aim to draw attention potential source error open discussion on how mitigate problems by improved definitions measurand.
This report gives the result of a bilateral comparison resistance between CMI (Czech Republic) and BIPM carried out in 2015. Two 1 Ω two 10 kΩ travelling standards belonging to were used. The was with an 'A-B-A' pattern measurements; measured first at for period about one month, then similar BIM, finally again BIPM. measurand 4 terminal dc low power. pilot laboratory, forms part ongoing key comparisons BIPM.EM-K13.a (for Ω) BIPM.EM-K13b kΩ). results from found be good agreement, difference...
At the Bureau International des Poids et Mesures (BIPM), Sèvres, France, capacitance unit is linked to a dc quantized Hall resistance (QHR) by means of impedance bridges and stable transfer standards, establishing traceability defining fundamental constants System Units (SI). In ohm-farad linking chain, key step determination frequency dependence two ac resistors. this article, it described how was recently made using different results are validated regression analysis.